Sleeve adapted to serve as core for paper rolls



June 19, 1923. 1,459,241

K. F. L. NORSTROM EVE ADAPTED TO SERVE AS CORE FOR PAPER ROLLS FiledMarch 31. 1922 Patented June 19, 1923.

UNITED STATES KARL FREIDRIK LENNART nonsrnoivr, or SKONVIK, SWEDEN.

SLEEVE ADAPTED TO SERVE CORE FOR PAPER ROLLS.

Application filed March 31, 1922. Serial No. 548.472.

To all whom it may concern:

Be it known that I, KARL FREDRIK LEN- NART Nonsrnou, residing atSkonvik, in the Kingdom of Sweden, have invented certain new and usefulImprovements in Sleeves Adapted to Serve as Cores for Paper Rolls; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The present invention has for object a sleeve adapted to serve as a corefor paper rolls for instance such as are intended for printing incontinuous lengths.

When printing newspapers and the like the paper to be printed is woundup in the shape of rolls rotatably arranged in the printing machine insuch a manner as to allow the paper rolls to rotate during the printingoperation while the paper to be printed is unwound according to theprogress of the printing.

Usually the paper roll is mounted on a hollow core or sleeve made ofmill-board or other material fit for the purpose in question. The rollis inserted in the machine in such a way that said sleeve together withthe paper roll wound on the same is put on a shaft arranged in themachine in a manner suitable for the purpose aimed at.

When unwinding the paper from the roll the rotation of the latter shouldbe braked or counteracted in a pro-per manner so as to impart to thepaperwhich is being unwound a tension suitable for the purpose.

For this purpose the ends of the sleeve have at their ends been providedwith longitudinal recesses adapted to be engaged by projections or thelike arranged on the said shaft so as to lock the paper roll to theshaft, which shaft then is braked in a suitable manner. Thisarrangement, however, involves the inconvenience that, on account of thetorsional stresses, the sleeve and sometimes also the paper rolls havebeen damaged or destroyed at their end parts where the recesses engagesaid projections on the shaft.

The present invention has for its object a device for obviating saidinconvenience. To this effect the recesses arranged in the ends of thesleeve are provided with plates-01 reinforcements for instanceconsisting of metal sheets or any other material suitable for thepurpose.

In order to make clear the invention the annexed drawing shows by way ofexample an embodiment of said plate or reinforce ment fit for thepurpose in question.

Fig. 1 is a perspective view of the sleeve and a part of the shaft.

Fig. 2 is a cross-section of the sleeve and the shaft through the recessand the plate or reinforcement arranged therein.

1 is the sleeve (shown without the paper rolls) and 2 the shaft, bywhich it is carried in the printing machine. 3 is the recess or recessesprovided at the ends, said recess engaging, when the sleeve is put onthe shaft, with projections, wedges or the like 4: attached to theshaft, the sleeve or the paper roll wound on the sleeve being locked tothe shaft by said projections. 5 is the reinforcement or fittingsarranged according to the present invention in the said recesses.

According to the embodiment shown on the drawing said fittings are madeof metal sheet and shaped in the manner clearly shown in Fig. 2, (seenin the axial direction) so as to form two U-shaped portions 6, eachgrasping one edge of the recess 3 while the ends of the outer branchesof said U-shaped portions 6 are connected by means of a portion 8integral with said U-shaped portions, said portion 8 being curved in acorresponding manner to the cylindrical portion of the sleeve so as tocoincide with the outer circumference of the sleeve. Thus, according tothe embodiment shown on the drawing the fittings are made out of onepiece or strip of metal whereby the manufacturing costs willconsiderably be reduced and the application of the fittings into therecess will only cause very little work or trouble.

Besides the portion 8 unites the U shaped portions 6 so as to permit thefittings or reinforcement to protect, in a very effective manner, thesleeve from being damaged by the engagement with the projections 4. Theportion 8 will, besides, prevent the inner layers of the paper in thepaper rolls from penetrating into the recesses 3 or from engaging withthe projections or wedges 4 which would damage the paper.

It is, however, not absolutely necessary that the portion 8 be integralwith the cylindric-ally rbent portions 6, but it may also be, in anyother manner suitable for the purpose united with the same. or it maypossibly be omitted.

Having thus described my invention 1 declare that what I claim is: v

1. A sleeve or sleeve-shaped core for paper rolls having recesses in itsends adapted to engage with projections on the shaft on which the rollis carried, the edges of said recesses being provided with fittings orreinforcements of sheet metal consisting of two U-shaped portionsadapted to fit on the edges of the recesses and a strip overlaying-saidrecesses at the circumference of the sleeve and connected with thebranches of the U-shaped portions.

2. Device according to claim 1, characterized by the fact that theportion connecting the U-shaped portions is curved' in such. a mannerthat it, cor-responds to the outer circumference of the cylindricalsleeve and is at its end portions connected with the ends of the outerbranches of the U-s'haped por tions and made integral with saidportions.

In testimony whereof I ElfilX my signatuire.

KARL FREDRIK LENNAR'T NORSTRfilVl.-

Witnesses: I

INEz BOENSON, L. BENGOM LINDE.

